House electric



w. G. M YLlus. ELECTRICAL MEASUHING INSTRUMENT.

.APPLICATION FILED OCT] 8,1918.

1,438,739. 'Painted oet. 31, 1922-.

4 SHEETS-SHEET l.

WITNESSES: INVENTOR BY I I I I M'l ATT'ORNEY W. G. MYLIUS.

ELECTRICAL MEASURING INrSTRUMENT.

APPLICATION FILED OCT4 8, 1918.

B l ATTo'RNEY W. G. MYLIUS. ELECTRICAL MEAsumNG INSTRUMENT.

APPLICATION FILED OCT. 8. 1918.

1,433,739. I Patented out 31,1922.

4 SHEETS-SHEET 3.

wlTNEssEs; |NVENTOR l 'N a ffm h/fr/Tyi.' f

W. G. MYLIUS.

ELECTRICAL MEASURING INSTRUMENT.

APPLICATION FILED OCT. 8, 19I8.

Patented oet. 31, 1922.4

4 SHEETS-SHEET 4 INVENTOR www WITNESSES:

Patented Oct. 31, 1922.

UNITED STATES PATsNT orFlcE..

WALTER G. MYLIUS, 0F WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTING-HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.

ELECTRICAL MEASURING INSTRUMENT.

Application filed October 8, 1918.

T0 all w hom it may cow/ocra Be it known that I, Nil/rmi G. MYLXUS, acitizen of the United States, and a resident ot' lVilkinsburg, in thecounty ot Allegheny and State of Pennsylvania, have invent-ed a new anduseful Improvement in Electrical Measuring Instruments, of which thefollowing is a specification.

My invention relates to electrical measur ing instruments, andparticularly to maximum-demand meters.

' One object. of my invention is to provide a unitary attachment thatmay be conveniently substituted for the integrating mechanism of awatthour meter of the ordinary type to constitute a maximum-demandmeter.

Another object of my invention is to provde an attachment, of theabove-indicated character, that shall have means for actuating a pointerin accordance with the maxin mum value of the average load beingmeasured.

A further object of my invention is to provide a device of theabove-indicated character that shall be simple and inexpensive toconstruct, easily applied to the meter, and effective in its operation.

In practicing my invention, I provide an attachment for a watthour metercomprising a pointer and a spring, one end of which is actuated by themovable member of the vsystem is connected, through a dog or other loosedriving connection, to the pointer.

Thus, the pointer is actuated in accordance with the differentialmovements of the ends of the spring and indicates the maximum value ofthe average load, or, in other words. a value that may be regarded asthe demand equivalent to the power traversing` the meter.

Figure 1 of the accompanying drawings is a front elevational view of apolyphaseewatthour meter embodying my invention; Fig. :2 is a side view,partially in section and. partially in elevation, of the meter shown inFi g. 1; Fig. Il is front elevational view of the maximum-dem andattachment shown in Figs. 1 and 2 g Fig. 4 is a front view Y of the attachment shown in Fig. 3, with parts broken Serial No. 257,326.

away; Fig. 5 is a bottom plan view of the attachment shown in Figs. 3and 4; Fig. 6 is'a view taken' along the line VI-V I of Fig. t3; andFig. 7' is a diagrammatic view ot a meter embodying my invention.

The polyphase watthour meter embodying my invention comprises, ingeneral, a casing 1 m which are disposed two meter elements and 3 and amaximum-demand attachment 4.

The meter elements 2 and 3 are mounted on a supporting member 14 andseverally comprise al stationary magnetizable core member 5 havingcurrent and potential windings 6 and 7 thereon, a disk armature 8 anddamping .magnets 9. The armatures 8 of the meter elements 2 and 3 aremounted on single sh aft 10 that is provided with a pinion l1 foractuating the maximum-demand attachment 4.

The maximum-demand attachment 4 is removable and comprises a framework12 that is adapted to he secured, by screws 13, to the supporting member14 of the watthour meter. The attachment 4 is adapted to he substitutedin place of the ordinary inrk tegrating device of a polyphase meter tothus constitute a maximum-demand meter without changing the structure ofthe meter itself.

The pinion 1l. on the shaft 1() actuates the device 4 through a gearwheel 15 that is mounted on a shaft 16 upon which is also mounted apinion. 17. The pinion 17 engages wheel 18 that is mounted on a shaft 19upon which is also mountedA a worm-screw 20 and a pinion 21. The worinscrew 2O is adapted to engage a worm wheel 22 that is mounted on a shaft23 upon which is also mounted a pinion 24 that cng'ages a train of gearWheels 25 which constitutes an integrating mechanism for actuatingpointers 26.

The pinion 21 engages a gear wheel 27 that is mounted on a shaft 2S uponwhich is also mountedva pinion Q9, and to which the inner end of aspring 30 is connected. The outer end of the spring 30 is connected tothe outer endv of a similar spring 31, the inner end of which is mountedon a shaft 32. The shaft 32 is disposed in direct aline4 nient with theshaft 28 and has a pinion 33 and a gear wheel 34 mounted thereon. rThegzgear wheel engages a pinion that is mounted a gear wheel 3T. rifhegear wheel e engages a pinion that is mounted on a shaft 39 upon whichis also mounted a disk armature Li0 that is disposed between the polesof two permanent magnets f1.1 and i2 which are adapted to retard themovement of the same. Bimetallic members i3 are provided for adjustingthe air gap between the magnets r-il and eti), in accordance withchanges in temperature to thereby compenfor any error incident to thechange in resistance in the armature -iO by reason of temperatureclii'anges.

A planetary gear device or system Llei comprises a gear wheel i5 thatengages the pinion 33, a gear wheel 416 that engages the pinion Q9 and aplanet wheel i7 that .is mounted on an arm 48 on the shaft 49, uponwhich is also mounted. a crown wheel 50. The crown wheel 50 engages asecond crown wheel that is mounted Yon a shaft at right angles to theshaft i9 and upon which is mounted a dog 53. The dog 53 is adapted toengage a pin 54 that is .secured to one side of a gear wheel 55 which ismounted on a. shaft 56, as clearly shown in Fig. 5 of the drawings. Thegear wheel 55 engages a gear wheel 57 that is mounted on a shaft 58 uponwhich is also mounted a maxim'um-demand pointer 59, A spring 60 pressesagainst the shaft 58 and provided with au adjusting screw (31 for sofrictionally holding the pointer 59 in its maximum position that itindicates, at all times. the maximum excursions of the dog 52?.

When the armatures 8 of the units 2 and 3 of the watthour meter areactuated by reason of the operation of the meter, the integrating device25, and, consequently, the integrating pointers 26, are actuated throughthe gear wheel 15, the pinion 17, the gear wheel 18, the worm screw 20,the worm wheel 2f?, and the pinion 24, to thus cause the pointers 26 toindicate the integrated energy, substantially as is customary inwatthour meters of the usual character.

llVhen the shaft 28, that is actuated in accordance with the speed ofthe armatures 8, is turned, the spring 30 is wound from one end and,since the springs 30 and 31 are connected together at their outerendsvthe spring` 31 is unwound from its outer end. Since the inner endof the spring 31 is connected, through the gear wheels Se, 35, 37 and38, to the damping disk 10, the springs 30 and 31 will not be freelyactuated. That is, they may be assumed to be a single spring, one end ofwhich is being wound by the watthour meter, and the other end of whichprevents the winding` in accordance with the speed of the winding. linother words, the ends of the springs will assume different. relativepositions with respect to each other for each speed of the armatures 8and, since the differential movement of the ends of the springs is ameasure of the average value of energy being measured, the planetarygear tem te is provided for determining the differential actions of theinner ends of the springs. Since the gear wheel 4G turns in onedirection and the gear 'wheel it'turns in the same direction, but lagsbehind the wheel 46, the planet wheel i7 and, consequently, the shaft49, will be actuated in accordance with the differential action of theends of: the springs, and the dog 33 will engage the pin Se to actuatethe pointer 59 in accordance therewith. Since the pointer 59 is notpermanently connected to the shaft Litl-'but is connected thereto'through the dog 3-and the pin 54, it will be understood thatthe pointer59 is merely a maXinium-indicating pointer, and that it indicates onlythe maX- imum indication of the average energy being measured or, inother words, the demand equivalent of the power traversing the meter.

li/ly invention is not limited to the speciiic construction illustrated,as it may be variously modified without departing from the spirit andscope of the invention, asset-forth in the appended claims.

l claim as my invention:

1. The combination with a watthour meter, of a unitary attachmenttherefor comprising a pointer, a planetary gear system, the planet wheelof which is operatively connected to the pointer,- a retardi-ng device,a spring connected to the retarding device and adapted to be connectedto the movable member of the meter, and means for connecting the othermembers of the planetary gea-r system to the retarding device and themovable member of the meter.

2, rlhe combination with a watthour meter, of a unitary attachmenttherefor comprising a damping disk, a spring disposed between thedamping disk and the movable member of the meter, a pointer and meansfor ac'- tuating the pointer in accordance with the differentialmovement of the two ends ot' the spring.

3. The combination with a watthour meter, of an attachment thereforcomprising a pointer, a damping disk, resilient means connected betweenthe movable member of the meter and the damping` disk, and means foractuating the pointer in accordance with the maximum differentialmovement of the inevable member of the meter and the damping disk.

i. The combination with a watthour meter, of an attachment thereforcomprising a pointer, a. damping disk, resilient means connected betweenthe movable member of the meter and the damping disk, and a planetarygear system for actuating the pointer in accordance with the maximumdifferential movement of the movable member of the meter and the dampingdisk,

5. The combination with a watthour meter,

of a ointer, a disk armature, magnets for retarding the disk armature, aspring connected between the movable member of the meter and the diskarmature for actuating the same, a planetary member actuated inaccordance with the differential movement of the ends of the spring, andmeans for operatively connecting the planetary member t0 the pointer.

6. The combination with a Watthour meter, of a spring connected at oneend to the movable member of the meter, means connected to the other endof the spring for causing a delayed movement between the ends of thespring, a differential-gear system connected to the ends of the spring,

and a pointer actuated by the diferentialgear system.

7. The combination with a Watthour meter, of a maximum-demand attachmenttherefor comprising a spring one end of which is adapted to beactuatedby the meter, means connected to the spring for controlling themovement of the other end thereof, and a pointer actuated in accordanceWith the differential movement of the ends of the spring.

In testimony whereof, I have hereunto subscribed my name this 21st dayof Sept. 1918.

VALTER G. MYLIUS.

